Consider a single-price monopolist that has the standard U-shaped cost curves. If the monopolist earns positive economic profit, which of the following statements is true? (choose all that apply) () The monopolist sets the price equal to the competitive equilibrium price level. Q) The monopolist sets a price greater than average total cost. ()The monopolist chooses the level of output where marginal revenue is equal to marginal cost. )The monopolist sets a price greater than marginal cost